Searching: Serious English-fluent Legal/Accounting (São Paulo)

I am looking for a VERY serious law firm - AND - VERY serious accounting firm.Both need to have people who are fluent English speakers that we will be dealing with, which are naturally the people who we will interface with and will need to know the most about our needs and status.

We already have an "can manage"-level English speaking people, but I need firms high fluency.

Also, as I indicated, we need those to be very serious.

As for the law firm - we need a firm with vast knowledge in many fields: Labor, contracts, taxation etc..As for the accounting firm - we need deep understanding in local taxation, international taxation and legal aspects relating to accounting and taxation.